Device for starting the dead-wheel in mutilated gears



(No Model,)

M. M. HOOTON.

DEVICE FOR STARTING THE DEAD WHEEL IN MUTILATED GEARS.

No. 326,984. Patented Sept. 29, 1885.

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DEVICE FOR STARTING THE DEAD-WHEEL lN MUTILATED GEARS.

SPECIFICATION forming part of Letters Patent No. 326,584, datedSeptember 29, 1885.

(No model.)

To all whom it may concern-.-

Be it known that I, hIARSENA M. HOOTON, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Devices for Starting theDead-Wheel in Mutilated Gears, of which the following is a description.

This invention relates to improvements in mutilated gear-wheels, inwhich the dead or mutilated wheel is intermittingly operated by a liveor continuously-operating drivewheel, which has a full set of teeth.

'Prior to my invention the dead-wheel has been actuated at regularintervals by means of a stud or other projection on the live-wheelcoming in contact with some fixed projection on the dead-wheel, theresult being that after the mutilated portion of the dead-wheel has beenbrought in oppositon to the livewheel, so as to effect a stoppage on thepart of the dead-wheel, the live-wheel cannot make more than onecomplete revolution before it will again start the dead-wheel, so as tocause the mutilated part of the latter to pass the livewheel and againbring the teeth of the two into mesh.

The object of my invention is to provide means by which the dead ormutilated gearwheel can be started at any time without reference to thenumber of revolutions or parts of a revolution which the live-wheel mayhave performed. In this way while the deadwheel can be brought to a stopeach time it has performed a revolution or after it has madea part of arevolution, according to the number of its mutilations, it cannevertheless be instantly started at any moment,thereby rendering themutilated wheel susceptible of a wide range of application.

The essential features of my invention consist in providing thedead-wheel with a movable tooth, slide, or latch susceptible of beingthrown into engagement with the live-wheel. at any instant during thetime the mutilated portion of the dead-wheel is in opposition to thelive-wheel, whereby the instant such engagement takes placethelive-wheel will turn the dead-wheel so as to again bring the teeth ofboth wheels into mesh.

Other features consist in means for normally holdingthe tooth or itsequivalent device in a back position until it is desired to throw itforward, and means for operating the tooth or latch, eitherautomatically or at will, so as to throw it into engagement with thelivewheel.

In the annexed drawings, Figure 1 represents a side View of a mechanismembodying my invention. Fig. 2 is a section on line as x of Fig. 1. Fig.3 is a section also on the line 00 m, but with the movable toothcountersunk in the dead-wheel so as to engage the teeth on the peripheryof thelive-wheel when thrown forward, as shown at S.

Referring by letter to the several figures of the drawings, in whichlikeletters denote like parts, A indicates the live or driving wheel,which is provided with a full set of teeth, and C the mutilated or deadwheel, which may be provided with one or more mutilations, I), ifdesired, the wheel herein shown being mutilated at one point only. Atthe point of its mutilation the dead-wheelis provided with a movabletooth, E, arranged to be projected from the wheel at the point where theusual teeth of the wheel are removed.

In Figs. 1 and 2 the live-wheel is provided on one side with an annularseries of studs, B, or other suitable projections. When the movabletooth E of the dead-wheel is thrown out to a certain distance, its outerend stands in the way of these studs on the live-wheel, so that thefirst one coming in contact with the movable tooth or latch on thedead-wheel will turn the dead-wheel enough to bring the com mon teeth ofthe two wheels into mesh. On the other hand, means are provided fornormally holding the movable tooth or latch on the dead-wheel back to anextent sufiicient to allow the live-wheel to turn freely without causingthe studs B to strike the movable tooth or latch, so that when themutilated part of the dead-wheel comes around to the live-wheel it willagain stand still until means are again called into action for throwingthe movable tooth forward into the path of the studs on the live-wheel,as before.

The movable tooth E (shown in Figs. 1 and 2) is arranged to slideradially with reference to the dead-wheel, upon which latter the movabletoothis retained by means of a suitable casing or keeper, F. The slidingtooth is normally held back in its keeper by some suitably-locatedspring, and is thrown forward from its back position by means of alever, j, which is pivoted upon one side of the deadwheel and connectedwith the sliding tooth by any suitable yielding connectionsuch,for eX-ample,as a pin, 9, on the inner end of the tooth extending out throughthe elongated opening h in the keeper, and engagingin aslot, 70, formedin one end of the leverj. in the keeper permits a suitable extent of endmovement on the part of the sliding tooth, while the pin-and slotconnection between the sliding tooth and the lever permit the lever tooscillate about its pivot on the dead-wheel,

and effect the required end movement on the part of the sliding tooth.

The leverj is pivoted toward its middle upon the dead-wheel,and ispreferably arranged so as to lie within the circumference of the latter,so that when studs B are used on the live-wheel the lever j will notcome in contact with them. The leverj is normally controlled by aspring, 111, secured at one end to a stud, m, or other fixture onthedead-wheel.

The free end of this spring bears against the outer end of the lever j,and its force is controlled by a set-screw, a, having a hearing at oneend in any suitable block or projection on the dead-wheelf This springserves as the initial controlling means for normally holding the slidingtooth E in its back position, and to this end the spring so acts againstthe lever j as to normally hold the lever in position to keep thesliding tooth in its back position; but it will be evident from the endto be attained that a like result could be attained by applying a springdirectly to the tooth E in any suitable way.

The lever j is operated to project the sliding tooth by means of anoscillating lever, O, pivoted to any suitable support and arranged sothat one end shall normally lie in the path of the outer end' of thelever j. Assuming the two levers to be in the relative positions shown,the sliding tooth will be in its back position, and the teeth of thelive-wheel A will freely pass the mutilated portion of they dead-wheelO, and the studs on thelive-wheel pass by the toot-h without engagingthe same. it, now, the lever O is from any cause or source or by anymechanism whatever turned about its pivot, so as to turn the lever j ina direction to throw the sliding tooth forward so that its outer endwill be in the path of the studs B, one of the studs will engage withthe tooth, and thus the dead'wheel be started into mesh with thelive-wheel, as above described. During this action the lever 0 turns thelever j against the resistance of the spring m, so that as soon as thelever j clears or slides off the lever O, the force of the spring willrestore the lever j and the sliding tooth to their normal position. Atthe completion of the revolution of the dead-wheel its mutilatiou, againcoming opposite the live-wheel, will necessarily take the two wheels outof gear, thus leaving the dead-wheel at a standstill, while thelive-wheel continues to revolve.

The opening or slot- This position brings the outer end of'lever j againin contact with one end of lever O, which is held in the path of theouter end of lever j by any'suitable devicessuch as the pins 00 andy-which serve as stops to limit its motion, so that it cannever bethrown entirely out of the path of the leverj when the dead-wheel is ata stand.

Obviously, where the dead-wheel is mutilated at more than one place, astarting mechanism such-as the one above described can be provided foreach one of the mutilations, and one lever, employed for all of them.

Where coarse or slow-moving gears are used,

the studs B on the live-wheel can be dispensed with, and the commonteeth of the live-wheel employed to subserve the purpose of saidprovided with a radial channel, S, running back from its mutilatedportion, and the sliding tooth E is arranged to work in said channel, inwhich case the keeperF can be formed by a slotted plate secured on thedead-wheel; or, in other words, the keeper shown in the precedingfigures will be simply flattened down. Under this arrangement thesliding tooth will be normally retracted clear of the teeth of thelive-wheel A, and when thrown forward will engage with one of saidteeth, and thus cause the dead-wheel to be rotated sufficiently to bringthe common teeth of the two wheels into mesh.

.The mutilation D of the dead-wheel should be of such size and shape asto permit the live-wheel to revolve freely without touching thedead-wheel, as represented in Fig. 1,

and only so much of the teeth of the dead- 4 wheel should be cut away asto make this.

possible. In this way the mutilation of the dead-wheel will be somewhatconcave, to suit the convexity of the teeth of the live-wheel.

The lever O can bespring-controlled, and can be operated from anysource. Thus, for example, it could be operated from the sheafgage on agrain-binder or from devices in measuring apparatus or other machines inwhich an intermittent motion is required, and where at any moment it maybe desirable to instantly start the dead-wheel, so as to cause throughits motion the operation of certain other mechanisms which, through themedium of mutilated gears, have been temporarily kept from action.

It will be observed that, by means such as herein described, thedead'wheel can at any time during the revolution ofv the live-wheel beinstantly started by simply throwing for ward the sliding tooth on thedead-wheel, so

as to bring it into engagement with the livewheel. 1t is obvious thatthe result is the ICC IlO

tulated Wheel resulting from the cutting away or absence of a part ofits teeth is temporarily supplied by the substitution of the slidingtooth or latch for the time, and as soon as its function is performedthe tooth or latch is returned to its back position leaving themutilation complete, as before.

I have not deemed it necessary to show a tooth movable in any other waythan sliding longitudinally, since it will be so apparent that aspring-controlled tooth pivoted on the dead-wheel could be made toperform the same function as the longitudinally-sliding tooth.

\Vhat I claim as my invention is 1. A gear having at one point only ofits periphery a mutilation of one or more of its teeth, in combinationwith a single movable tooth mounted thereon, substantially as described.

2. Agear having at one point only of its periphery a mutilation of oneor more of its teeth, in combination with a single tooth mounted thereonand movable on a line radial to the axis of said gear, substantially asdescribed.

3. A mutilated gear and a movable tooth thereon, in combination with thespring actuating said tooth, substantially as described.

4. A mutilated gear and a movable tooth thereon, in combination with thespring actuating said tooth and a screw for adjusting the tension ofsaid spring, substantially as described.

5. The mutilated gear and the sliding tooth, in combination with thelever pivoted on said gear and engaging the sliding tooth, substantially as described.

6. A gear having one or more of its teeth removed, in combination with aperfect gear and a movable tooth on the mutilated gear for engaging saidperfect gear, substantially as described.

7. A perfect gear and one or more studs on the face thereof, incombination with the movable gear and a movable tooth thereon forengaging said studs, substantially as described.

8. The mutilated gear and the sliding tooth thereof, in combination witha connectinglever, O, and a connection between said lever and tooth,substantially as described.

MARSENA M. HOOTON.

In presence of CHAS. B. MELROSE, F. L. BROWN.

